Head-motion.



No. 802,016. PATENTED OCT. 17, 1905.

H. D. MoLEOD.

HEAD MOTION.

APPLICATION FILED JULY'8,1904.

3 SHEETS-MEET 1.

No. 802,016. PATENTED OCT. 17, 1905. H. D. MQLEOD. HEAD MOTION.

APPLIOATION FILED JULY 8,1904.

3 SHEETS-SHEET 2.

ANDREW a mum C0, PHOIO-UYNOGRAPNERS, WASNNGYOVL u c.

N0. 802,016. PATENTED OCT. 17, 1905.

D. McLEOD. HEAD MOTION.

APPLICATION FILED JULY 8,1904.

3 SHEETS-SHEET 3.

HOWARD D. MOLEOD, OF GREATFALLS, MONTANA.

'HEAD-IVIOTION.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed July 8, 1904. Serial No- 215,725.

To aZZ whom, it may concern:

Be it known that I, HOWARD D. MCLEOD, a citizen of the United States,residing at Greatfalls, county of Cascade, Montana, have inventedcertain new and useful Improvements in Head-Motions, of which thefollowing is a specification.

This invention relates to head-motions for imparting a reciprocatorymovementto oreconcentrating tables of the Rittinger, Gammett, VVilfley,and other types, and, in fact, to other devices requiring a shakingmotion, as to shaking screens, grizzlies, and pickingtables.

One of the objects of the invention is to provide mechanism capable ofimparting the desired progressive motion to the particles, especially onan ore-concentrating table, so that any material placed upon the tablewill be caused to advance along the table-surface in the proper manner,the mechanism being capable of such adjustment as to adapt it todifferent classes of ores and their attendant gangue.

A further object of the invention is to provide means for obtaininggreat differences of amplitude of reciprocation and great changes inspeed, so that the table may be driven a large number of strokes perminute at small amplitude for very fine mesh material or a smallernumber of strokes per minute at greater amplitude of reciprocation. Thisobject is obtained by an exceedingly simple mechanism.

Another object of my invention is to provide a simple means for securingthe adjustment of the length of the stroke entirely independent of anyadjustment of the quality of the stroke, which latteris obtained in thehead-motion alone.

Further objects of the invention will appear hereinafter.

My invention consists of certain features and combinations hereinafterdescribed and claimed, reference being had to the accompanying drawingsas showing a suitable form of my invention, and in which.

Figure 1 is a sectional side elevation showing a head-motion embodyingthe features of my invention. Fig. 2 is an end elevation of the same.Fig. 3 is a plan view, parts being in section and parts removed for thesake of clearness. Figs. 4 and 5 are detail views of the toggle.

Referring to the drawings, the frame a is provided with side brackets b,at the upper portions of which are bearings 0. In these bearings turns acranked shaft d, one end of which may carry fast and loose pulleys,which pulleys may be driven in either direction. Any suitable drivingmeans may be employed. The eccentric portion cl for said shaft (Z, andwhich is located between the bearings c, has mounted thereon one end ofa pitman e, which is carried round in a circle by means of the saideccentric portion. Other means may evidently be substituted foraccomplishing the desired reciprocating motion of the pitman. Theopposite end of the said pitman is preferably compelled to travel in thearc of a circle, which may be effectuated by means of two links f, whichlinks extend from the pitman at some point forward of the verticalcentral line through the shaft (Z, in reference to the attaching-pointof the table or object to be shaken. Said links f are tension links orconnections. A pin g connects said links with the pitman, and the linksare pivotally supported on the frame at f. Means other than those shownmay be employed for guiding the free end of the toggle in the desiredpath, which need not necessarily be arcuate. This is evident withoutillustration and is intended to be comprehended by the invention. A linkh is preferably pivoted to the frame a at it, and through its other endthere passes a pin or short shaft connecting pull-rods 2'.

Located between and having bearing on the pins or shafts g and if is atoggle 70. This toggle preferably consists of a part such as shown indetail in Figs. 4 and 5 and comprises a shank portion k, a yoke portion70 and a half-box 7x on each bifurcation of the yoke and anotherhalf-box It" at the other end of the toggle. The half-box 7c bears onthe pin or shaft 9, carried by the pitman a, while the other half-boxes70 are located one on each side of the link it for bearing on the pin orshaft if. The movement of the outer or yoke end of said toggle iscontrolled by the pin if and the. aforesaid link 72 The toggle ispreferably provided with means for lubrication,

(indicated at 1'.) For the purpose of adjusting the link it preferablyas to its length and for moving the point or pin 71, relatively to theother moving parts, said link It is for convenience composed of twosections 70 if, provided with right and left screw-threaded bores orsockets to receive the right and left screwthreaded ends of a shortshaft 7L6, provided with a turning-head it and forming thereby aturnbuckle. The described or equivalent adjustment of the link it causesa difference in the length or intensity of stroke of the table or otherobject which is suitably held to the point at if.

The pull-rods may, if desired, be connected with the part to be actuatedthrough the medium of a rocking lever m, which is pivoted at one end atm to the frame a, the pull-rods being pivoted thereto at i. The saidrocking lever is connected with the part to be actuated by means oflinks or rods 07., the inner ends of which are pivotally supported on across-head 0, which is internally screwthreaded to receive ascrew-spindle 9, whereby the said cross-head may be moved alongguidewaysp of the lever m. The purpose of the intermediate connectionafforded by the lever on and concomitant parts is for adjusting thestroke and intensity of movement. The action in the embodiment of theinvention shown is as follows: The eccentric d imparts a reciprocatingmotion to the pitman and an oscillatory motion to the links 'f, whichresults in raising the pin 9 and through the toggle is urging the pin7L2 and links 2' toward the left and moving the part to be actuated at agrad ually-decreasing velocity. On the return stroke the elocitygradually increases, so that by mean of the toggle and preferably bymeans of the vibratory motions of the links or connectin rods thepeculiar quality of motion desire is obtained.

It is to be understoo hat the word toggle used herein con mplates anelemental moving piece of machinery which sustains compression only. Thehead-motion described therefore contains a toggle which preferablyprojects, although not necessarily, from the pitman in a direction awayfrom the part to be actuated, such as an ore-concentrating table, andboth ends of which are in action, in this instance moving in arcs ofcircles.

Having thus described my invention and without limiting myself todetails, asobviously some of the features may be used Without others orin combination with others, what I claim as new therein, and desire tosecure by Letters Patent, is-

1. A head-motion comprising a pitman, means for restraining the free endof the pitman except as to reciprocation, a link pivoted at one end to astationary object, an actuating-bar pivoted to the free end of saidlink, and a toggle directly connecting the free ends of said pitman andof said link.

2. A head-motion comprising a pitman, a link pivoted at one end toastationary object and at the other end to said pitman, a second linkpivoted atone end to a stationary object, an actuating-bar pivoted tothe free end of the link, and a toggle directly connecting the free endsof said pitman and of said link.

3. A head-motion comprising a pitman, means for restraining the free endof the pitman except as to reciprocation, a longitudinally-adjustablelink pivoted at one end to a stationary object, an actuating-bar pivotedto the free end of said link, and a toggle directly connecting the freeends of said pitman and of said link.

4. A head-motion comprising a pitman, means for restraining the free endof the pitman exceptas to reciprocation, a link pivoted at one end to astationary object, an actuatingbar pivoted to the free end ofsaid link.a toggle directly connecting the free ends of said pitman and of saidlink, and means connected with the free end of said bar for varying thetravel of a reciprocated object attached thereto.

5. A head-motion comprising a pitman, means for restraining the free endof the pitman except as to reciprocation, a link pivoted at one end toastationary object, an actuatingbar pivoted to the free end of saidlink, a toggle directly connecting the free ends of said pitman and ofsaid link, a rocking lever pivoted at one end to a stationary object andpivotally connected with said actuating-bar, a link-pivotally connectedto said rocking lever, and means for varying the point of attachment ofsaid link to said rocking lever.

.6. A head-motion comprising a pitman, means for restraining the freeend'of the pitman except as to reciprocation. a link pivoted at one endto a stationary object, an actuatingbar pivoted to the free end of saidlink, a toggle directly connecting the free ends of said pitman and ofsaid link, a rocking lever pivoted at one end to a stationary object andpivotally connected with said actuating-bar, a longitudinally movablecrosshead in said rocking lever, and a link pivotally attached to saidcross-head.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

HOWARD D. McLEOD.

Witnesses:

W. A. VVEBsTER, CHARLES E. Rowe.

